A monthlong series of cleanups in the U.S.-Mexico border region yielded more than 2,300 tires and 56 tons of garbage that could have ended up at sea by way of the Tijuana River.Environmental group Wildcoast of Imperial Beach increased efforts to control pollution near the border this month with the help of several partners, including nonprofit organizations such as Surfrider San Diego and San Diego Coastkeeper.More than 2,800 volunteers participated.Among the most successful cleanups this month:-An Oct. 16 event at Cañon de los Laureles in Tijuana that cleared 21 tons of trash from the channel that drains into the Tijuana River. That involved 30 volunteers.-An Oct. 18 gathering of 41 trade-student volunteers and instructors from the San Diego Job Corps. They removed about 1,000 tires from the main channel.Last Saturday’s cleanup was canceled due to rain, a pattern that Wildcoast officials are expecting to continue, said Paloma Aguirre, border program manager for the group.”This month has been great, but I was kind of saddened and disappointed that we couldn’t host the last cleanup,” Aguirre said.The group will wait for better weather before scheduling future cleanups and environmental workshops in the border area, she said.